Woodworking machinery.



W. F. IVICDOWELL.

WOODWOBKING MACHINERY.

APPLICIIITIONV FILED IAN. I4. 1915.

1,163,098. Patented De@ 7, 1915.

5^ 3 SHEETS-SHEET I.

@.rwm. MQ' l jwwgfwd W. F. McDOWELL.

WOODWORKING MACHINERY.

APPLICATION FILED IAN. 14. 1915.

1,163,098. Patented Dec. 7, 1915.

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' fnl/anion' COLUMBIA PLANDORAPH C0.. WASHINUTDN D. C,

Milian: //yawell w. F. MCDOWELL.

WOODWORKING MACHINERY.

APPLICATION FILED IAN.14 1915.

1,163,098. Patented Dec. 7, 1915.

3 SHEETS--SHEET 3.

\I'? I I l l I I I `c0LUMB|A PLANUURAPH cn., WASHINUTDN, D. c

uNiTED sTATEs WILLIAM F. 'McDOWELLfOF GARDNER, AMFASSACIE-IU'SETLS. n

lwo'cmwo11E-ING. MACHINERY.

Specification of Letters Patent.

Paeentednee. 7,1915.

Application led rJanuery 14, 1915. Serial N o. 2,239.

To all cli/0m t may concern .Be it known that I, )VILLTAM F. Mc- DowELL, a citizen of the United States, residing-at Gardner, in the county of )Forces-v ter and State of lVIassachusetts,.havein` vented new and useful loodworking Machinery, of which the following is a specification.

This invention relates to a wood working machine capable of general Aapplication but more particularly designed yfor grooving the upper back rail of the chair 'shown in my pending application, Serial No. 774,605, filed June 19, 1913.

It is the object of my invention to provide Yimproved devices for positioningand holding the work and for moving the same relatively vto the cutting tool.

lVith this object in view my invention relates'to certain devices, arrangements and combinations of .parts `which vwill be hereinafter described and' more particularly pointed out in Vthe appended claims.

A preferred form of the linvention is shown in the drawingsin which- Figure 1 is a front elevation of'thema-l chine; Fig. 2 is a detail section taken on the line 2-.2 in Fig. 1; Fig. 3 is a top plan view yof the machine; Fig. 4`is aside elevation thereof; Fig. 5 is a partial vertical section substantially on 'the line 5-'5 lin Fig. 1; jFig. 6 is an enlarged detail of one of the work gages; Fig. 7 is a detail view in elevation of a part of a chair back rail, for the production of which the machine is particularly designed, and Fig. 8 is a sectional view taken on the line 8 8 in Fig. 7.

As shown in the drawings, my machine comprises a base lO'havingiXed bearings'll and 12 (Fig. 3) fora tool spindle 13. The spindle 13 is provided with a pulley 14 which may be belt-driven from any convenient source of power. The spindle13 also supportsv the rotating cutting tool 15 at one end thereof, the spindle being provided vwith suitable shoulders `and collars for preventing longitudinally displacement thereof. y Upon vits front side, the base 10`has a projection 10a (Fig. 2) upon which are secured guide strips 16. The strips 16 serve to position a vertically movable plate 17 and 16 may be formed with an adjustable gib 16L for close adjustment to the plate 17.

A bracket 18 is secured to or formed in tegral with the plate 17 and supports the one strip j table y19 uponits upper face. Thetable 19 will ordinarily be formed 'of wood and is provided at each end with depending members T20 and 21 (Fig. 1) which are retained in proper relative position by brackets 22 and l23. vThe members 20 and 21 have ways 24 and 25 (Figs. 1, 3 'and 4) on their outer surfaces, serving las guides for vertically sliding plates -26 and 27 to whichare secured the table extensions 28 and 29, these-- extensions being reinforcedby brackets 30. The plates 26 and 27 `areV slotted Vas indicated at 31 (Fig-4) and are rheld in'adjusted position by binding nuts 32 which .secure the 'plates to the depending members 20 and 21.

A' downwardlyextending'bar 331`(F ig. l) is secured to the plate 17 or the bracket 18, and is bar 34. A vpair Vof heavy spiral' springs 35 arey secured at their uuper ends to rods 36 projecting forwardly 'from the upper part of the base 10 and at their lower ends are connected 'to the cross bar 34. The 'springs 35therefore act'to normally retain the table 19 at its upper limit of travel. `Any suitable stop, ysuch-as an yarm 37 mounted on the bar 33, may be provided tolimit the upward movement. j

A foot pedal '38 vextends through a slot 39 (Fig.y 1) `in Vthe lower part of the base and is movable about a fixed pivot n40 (Fig. 4) at "the vback of the machine. Near its forward end lthe lever 38 is rkpivotally connected by a link 41 to the lower end Iof the bar 33, lthe pedal ythus being effective lto move the table downwardly past the cutter ,14 against lthe resistance of thesprings For positioning rand holding ther work, a pair of upright. guides 42 (Figs. 1 and 4) are secured to the able 19, these 4guides in their preferred form being provided with base portions 43 (Fig. 5) extending beneath the table and secured in recesses therein. The guides 42 serve to position the ywork in one direction and may be normal to the surface of the table `or slightly inclined thereto as determined bythe nature of the work. It will be noted that these guides are positioned closely adjacent to the cutter 15 and on each side thereof, so that the work issecurely supported at thecutting point.

For Vclamping the work against the guides 42 I provide a plunger 44 (Fig. 5)y slidable in a block 45 secured to the upper surface of provided at its lower end witha cross the table 19. i Intermediate its ends the in the block 45 by a cap 49 having upwardlyl projecting ears 50bet'ween whichis pivotallymounted a hand lever .51 having adey pending portion 52 adapted to engage the rear end of the plunger 44. At its'forward end the plunger may have an enlarged head 53 and may also be suitably faced with leather or other suitable material 54 tov pre-j vent marring the work.

jWhen the Work is positioned between the guides `42 and the head 53 of the plunger'44, downward movement ofthe lever 51 will force the plunger rearwardly to secure the work in position. j v j For` positioning the work longitudinally, I provide apair'of stops' 55-and 56 (Fig. 3) formed of flexible material and secured in longitudinal grooves 57 in the upperV surface" of the table 19.` Underneath the movableends-of'the stops avtapered groove 58 (Fig.rv 6) is-provided within which the end of they stop may be received. l As previously stated, my machine is particularly designed for operating uponl the upper back raily of a chair and it is necessary that it should be at all times operable upon either end of the rail. l Byk the use of the yielding ystops just described, either one yof the stops mayl be utilized to position the rail and the other stop may be pushed downwardlybyl thework so that it will lie below the surface of the table.l

In'Figs. k7 and 8 I have shown one end ofy al chair rail, for the production of whichmy machiney is particularly designed. `It will be seen that the rail 6'() is provided with an undercut groove 61 extending partially across the back side of the rail, a similar groove being provided at the oppositeend of the rail (not shown).y As shown in Vthe drawings, the groove 61 is not exactly normal to the lower surface ofl thel rail. i HThis relation is determined by the angle at which the back legs of the chair meet the upper rail and it will be seen .thatl the angle will be reversed at the opposite end of the rail.

Inorder that the groove in the rail may be formed-at any desired angle I have provided the vertically adjustable table extensions 27 and'28, by the use of which the outer end of the rail may be raised or lowered Vrelatively (lopies of this patent may be obtainedr for compression spring v the pin also limiting the'.

to theend upon whichl the cutter is operating. f

By adjustin the extensions at the same height relative to the table 19 and resting the work alternately upon the extensions 28 and 29, the grooves will be formed atl equal but reversed angles at the opposite ends of the rail. Vhen one end of the rail is Vraised upon the extension 28 the opposite end of the rail will rest upon the table 19 and will engage and be positioned by the stopy 55, the intermediate portion of the rail resting upon the stop 56 and depressing the same to the level of the table. Havingthe work thus positioned, the handle 51 is pushed downwardly to clamp the work against the guides 42 and vthe foot pedal 38 is operated to carry the work downwardly past the cutter 15. Any suitable adjustable stop such as the screw 62 engaging the arm'87 may constitute means for limiting the downward movement of the table 19.

Having thus described my invention it will bel evident that changes and modiiications can be made vtherein withoutl departing from the spirit and scope thereof as set forth in the claims and I do not wish vto be limited to the details herein discribed but What I do claim is- 1. Aiwood working machine comprising a base, a tool-carrying spindle rotatable in fixed vhorizontal bearings on said base, a

'work support vertically' movable in Vfixed guides on said base in a planev normal to said spindle, and means for positioningand holding the work on said table,fsaid` table comprising a center portion and `extensions adjustable verticallyy relatively to said center portion, said extensionsk being effective to vary the angle at which the work is supported upon the center portion.

*2. A wood working machine comprising a base, a tool-carrying spindleV rotatable in fixed horizontal bearings on said base, a work support vertically movable infixed guides on said base in a plane normal to said spindle, and means for positioning and'holding the work on said table, said means coinprising flexible end gages yieldingly movable to zinoperative adjustable relatively'to the tableto yvary the angular position of the work thereon.

In testimony whereof l have hereunto set my hand, inthe presence of two subscribing witnesses.k

` WILLIAM F. MGDOWELL.

Witnesses:V

CHARLES I-I, YoRKE, FRANK B. EncniLL.

ve cents each, by addressing theV Commissioner of Patents, Washington, D. C. Y

position and extensions 

